\'What a rollicking olden-days adventure this is, replete with mystery, secret passages, menacingly elusive enemies and a main character readers will truly root for\' JOANNE OWEN, author of MARTHA MAYHEM Ten-year-old Beatrix is very good at telling jokes, dancing and throwing knives.. \'What a rollicking olden-days adventure this is, replete with mystery, secret passages, menacingly elusive enemies and a main character readers will truly root for\' JOANNE OWEN, author of MARTHA MAYHEM Ten-year-old Beatrix is very good at telling jokes, dancing and throwing knives.